| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parallel Seq Scan vs kernel read ahead |
| Date: | 2020-06-18 15:26:20 |
| Message-ID: | CA+TgmoYG-u4WTB1XV6cSei-s2Jdde13d2yUtbenLH66eMAPYcw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jun 18, 2020 at 6:15 AM David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
> With a 32TB relation, the code will make the chunk size 16GB. Perhaps
> I should change the code to cap that at 1GB.
It seems pretty hard to believe there's any significant advantage to a
chunk size >1GB, so I would be in favor of that change.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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